"I was jus' foolin', Lennie. 'Cause I want you to stay with me..."
"If you don't want me, you only jus' got to say so, and I'll go off in those hills right there..."
"Why ya think I'm sellin' him out?"
"Well, I've never seen one guy take so much trouble for another guy..."
"Well, it's ten acres. Got a little wind mill..."
"Go on- tell again George."
From the way George and Lennie are interacting, we can clearly see that George cares for Lennie when he is upset, and that their friendship cannot be broken by an argument, an insult, what have you, thus truly portraying the theme of that of friendship.
From this, we can really see how rare and valued friendship is, as the boss of the ranch is bewildered by the fact that George cares so much for Lennie, as friendship has now seemed to fade away in the work environment. This then proves that the theme of friendship is very valued by people, as it only seems to be recognized on rare occasions.
"They got to bring him in, I guess. Maybe they won't hurt 'im, I ain't gonna let 'em hurt Lennie."
This shows that no matter how many times Lennie asks, how irritating it is, George still tells Lennie about their fantasy and how they would get a piece of land for them to live on and own rabbits just for Lennie. George does this not because he wanted to, but because that is what friends do for one another, thus strongly displaying the theme of friendship and its great values towards life.
"Guys like us have no fambly. They make a little stake an' then blow it in. They ain't got nobody in the worl' that gives a hoot in hell about 'em-"
As Crooks continues to talk of his strive for a friend or someone to talk to, it really shows how much a friendship is envied, valued, and how it affects Crooks in that it makes him upset. Thus, Crooks is clearly proving the theme of the importance of friendship and how it is presumed as a positive attribute to life, as he truly wishes for a friend. This thus also shows how it helps people live a better life in Of Mice And Men.
" He can't turn to some other guy and ask him if he sees it too."
Based on Georges self assertions that he is not gonna let they guys hurt Lennie, we can really see how this brings out his true friendship with Lennie, and portrays the theme. He understands Lennie, he cares about Lennie's well being, no matter what he did. He still cares for Lennie, thus showing the power of friendship and how it is the theme of this novel.
This series of conversation between George and Lennie depicts their last moments together. Despite the fact that Lennie killed someone, George still wants him being happy before he kills him, so he tells Lennie about how he and George are special, how they've got each other, and how that is what "gives a hoot in hell about us" as Lennie says, displaying the value of their friendship and how each of them treasures it, which truly ties the whole theme of friendship together.